Period Calender ⭐⭐
Key Takeaways
Period & Ovulation Tracking: Period Calendar offers basic cycle tracking with visual predictions, reminders, and symptom logs. However, ovulation and fertility predictions are not evidence-based and lack personalization based on biomarkers.
Data Privacy: There are serious concerns around user data, with vague consent practices and prior reports of third-party data sharing.
User Experience: The interface is approachable and colorful, but symptom logging relies heavily on emojis and lacks medical precision.
Verdict: Period Calendar may suit users seeking simple tracking, but fails to meet medical, ethical, and privacy standards required for serious health support.
Medical Integrity
Score: ⭐⭐☆☆☆
The app does not appear to involve medical professionals in developing its content or predictions. There’s no sourcing for educational material, and ovulation calculations are overly simplified.
Doctor’s Note: This app does not provide clinically validated insights. While it's accessible, users should not rely on it for fertility planning or reproductive health decisions without professional guidance.
Ethical Standards
Score: ⭐⭐☆☆☆
The app lacks clear consent mechanisms and transparency about how user data is used or monetized. There's also no ethical framework guiding its educational content or features.
Doctor’s Note: Ethical health apps need to clearly inform users about what’s happening with their data and content. Period Calendar doesn’t provide this clarity, especially for younger or vulnerable users.
Data Privacy & Protection
Score: ⭐☆☆☆☆
Period Calendar has a history of problematic privacy practices, including potential third-party data sharing without adequate user control. The privacy policy is dense and lacks clear user rights, especially around opt-outs and deletion.
Doctor’s Note: Data privacy is non-negotiable. This app currently fails to meet basic expectations for secure handling of sensitive health data.
UX & Accessibility
Score: ⭐⭐⭐☆☆
The app is bright, customizable, and easy to use, but its symptom logging is overly simplified and lacks features for accessibility (e.g., screen reader compatibility or multilingual support).
Doctor’s Note: A positive experience shouldn’t come at the cost of depth or inclusion. The app’s design is beginner-friendly, but not medically informative or inclusive of different user needs.
Behavioral Impact
Score: ⭐⭐☆☆☆
The app uses notifications and gamified design elements that may encourage daily check-ins or upgrades. It doesn’t offer meaningful behavior change support or education.
Doctor’s Note: Behavior nudges should empower, not pressure. This app leans more into habit-formation than informed decision-making, which limits its long-term benefit.
Final Score: ⭐⭐☆☆☆ (2/ 5)
Verdict
Period Calendar is a user-friendly, entry-level tracker—but it lacks the medical oversight, ethical transparency, and privacy protections that would make it trustworthy for long-term reproductive health use.
Review Notes
This review is based on the app’s performance as of 14/04/2025. If the app undergoes significant updates or improvements, the developers are welcome to reach out for a re-evaluation, which may lead to a higher score and potentially a SheRanked Doctor’s Approval Badge.
Reviewed by: Dr Christina Davies, SheRanked Doctor-led Review
Review Date: 14/04/2025
Medical Disclaimer:
This review reflects an expert evaluation by a medical doctor, based on the app’s clinical credibility, ethical standards, data protection practices and user safety profile. It is not intended to provide individual medical advice, but rather to assess the app’s integrity and reliability for women’s health use.
Official Website: https://period-calendar.com